Filter.



L. R. GLARKfiz D. G. KREUL.

FILTER.

APPLIOATION FILED FEB. s, 1910.

974:,025. Patentd Oct. 25, 1910.

W1 TNESSES UNITED STATE S PATENT OFFICE.

LUCIUS R. CLARK AND DWIGHT G. KREUL, OE DAVENPORT, IOW A.

FILTER.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Application filed February a, 1910. Serial No. 541,797.

To all whom it may concern: v

Be it known that we, Lucius R. CLARK and Dwmn'r G. Knnun, citizens ofthe United States, whose post-othce address is Davenport, in the countyof Scott and State of Iowa, have invented a new and useful Improvementin Oil-Filters, of which the following is a specification, referencebeing had therein to the accompanying drawing, forming a part thereof.

Our invention relates to improvement in oil filters.

The object of our invention is to provide a filter adapted to remove theimpurities from oil that has been once used as a lubricant and has beenmixed with impurities arising from such use and consists in theconstruction and arrangement of parts as will be hereinafter describedand particularly pointed out in the claims.

ur invention provides further, a filter having an outer casing, achamber within said casing for receiving the impure oil, means by whichthe oil is carried first downward from the receiving {chamber to theinside of a settling chamber and upward through an appropriate filteringmedium to the receiving chamber for pure oil, from which it maybe drawnby a faucet.

Figure 1 1s a vertical section of our improved apparatus, showing theparts in a closed osition, Fig. 2 is a sectional view of the iibatmechamsm, Fig. 3 is a top plan view of the same and Fig.4 is a detail ofthe sliding gate.

Referring more particularly to the drawings which are for illustrativepurposes only and are not drawn 'to scale, .1 is the main chamber,provided with a cover 2, the chamber and cover being-preferablycylindrical in shape, 3 is the receiving chamber for pure 011, 4 is anoil supply chamber for the reception of impure oil, 5 is asettlingchamber attached to the base of the filter, 6 is a pipe leading from thereceiving cham ber discharging through angle valve 7 into the funnel8, 9is the float chamber connected to the funnel by the opening 10. A hollowpolyhedral float is shown wlthin the vfloat chamber as a triangularprism, at 11, a

rod 12 is swiveled to the bottom of the float and to the extremity of alever 13, the lever is pivoted to a support 15 at 16, a sliding gate 17is adapted to close pipe 6 and the gate is swiveled to a rod 18, whichrod is swiveled to lever 13 at 19. Cocks 20 and 21 admit the filteredoil to the glass 22, impure oil is introduced within the settlingchamber 24 by means of the descending oil tube 23, horizontal disks 25and 26 having coarse perforations compress the filtering medium ofcotton waste or other suitable material 27 within the cylinder 28. Ahollow threaded adjusting rod 29 receives a clamp 30 adapted toactuation for the purpose of compressing the filtering medium by levers31. An air vent 32 connected at its lower extremity interiorly with theadjusting rod 29 affords an exit for air from the settling chamber 24. Acook 33 regulates the flow of oil or sediment from chamber 24 tosettling basin 5, and a cock 34 at the base of basin 5 regulates thedischarge of the contents of the lower chamber into the waste pipe.Sight glasses .35 and 36 afford a view of chambers 4 and 5 respectively.Oil is introduced into the receiving chamber 4 through the pipe 37, pipe38 provided with ground union 39 affords a means of withdrawal of waterfrom chamber 4, pipe 37 terminating in an upturned L 40 provides a meansfor the introduction of impure oil into the receiving chamber with aminimum disturbance of the sediment at the bottom of said chamber.Provision is made for the withdrawal of air from settling chamber'5through a cock 42;

Our invention is operated as follows: Oil

is introduced through the pipe 37 and passes into the supply chamber 4,which may be square, cylindrical or of other convenient form, throughthe upturned L 40, within the chamber, which is introduced approximatelymidway of the depth of the chamber for the purpose of providing a spacefor settling in the bottom of the receiving chamber and the purpose ofthe upturned L is to prevent the disturbance of sediment in the bottomof .this chamber by the impact of the fiow.-

Pipe 38 is united to the receiving chamber near to the bottom thereof bya groundunion 39, about which the pipe is rotatable and" through whichthe contents of the chamber may be discharged by turning the pipe. Asight glass 35 exhibits the 'state of the oil and impurities of whichthe principal one to be extracted in this chamber is water whichcollects in the bottom of the chamber. The oil passes out of thereceiving chamberthrough pipe 6, which is provided near its inlet with avalve 17. The outlet of pipe 6 is open to the air and it empties into afunnel 8,-surmounting the descending oil tube 23. Funnel 8 is connectedto the float chamber 9 by the opening 10, through which oil may flowfrom the tunnel to the float chamber, where it will cause float 11 torise, actuating rod 12, lever 13 and rod 18, and

through the last rod referred to, actuating valve 17 in a directionopposite to that taken by the float, closing or partially closing pipe 6to prevent an overflow of funnel 8. The

float 11 is of polyhedral shape to prevent capillary attraction betweenthe walls of the float chamber and the float.

From the funnel the oil passes to settling chamber 24 from which itpasses by gravity through coarse openings in disk 25 to the filteringmedium of cotton waste or other desirable material, through a similarplate 26 at the top of the filter and into the pure oil chamber 3, fromwhich it may be drawn or pumped through cock 43. Provision is made forthe extraction of air from the oil while in chamber 24, through thehollow adjusting rod 29 which receives the threaded clamping member 30to press together the disks 25 and 26 to produce the desired resistanceto the passage of the oil through the filtering medium. The air soextracted passes out of the filter through the vent 32 in the cover 2.

Heavy sediment passes downward from chamber 24 into chamber 5 providedwith a sight glass 36 and an air vent 41 and the flow from chamber 24 iscontrolled by means of cock 33. The contents of this chamber aredischarged into the waste pipe or otherwise, through cook 34. Chamber 5is of angular form and the contents are introduced vertically at a pointapproximately midway of the depth of the chamber for the purpose 40 ofallowing any air still contained in the oil or its refuse to pass intothe upper portion of the chamber and to prevent the reflow of the airbackward through cock 33. When the contents of chamber 5 are withdrawn,or

when the air within this chamber reaches a point below the lowerextremity of pipe 41 the air will pass out when cock 42 is open.

Levers 31 integral with clamping member 30 afford a means ofcompressingthe filtering medium.

This filter is intended tobe operated in groups, of which the devicedescribed constitutes a unit. The same head will actuate all feed pipesand the problem of getting the same work from the various units is metby setting the resistance in the filtering medium to meet the density ofthe particular oil passing through the unit. Should the unit be workingslow the overflow from the open funnel will be prevented and the amounttaken into the unit regulated by the float, which in turn is regulatedby the backing up from the supply pipe and the resistance to which themedium is set.

Having thus fully described our invention,

pipe surmounted by a funnel and open to the air cooperating with thevalve to take oil from the receiving chamber a settling chamber belowthe level of the receiving chamber, rigid connection between the lowerend of the gravity pipe and the settling chamber a filter chamber formedwith the settling chamber and adapted to receive oil upwardly from thesettling chamber, a hollow threaded adjust-ing rod, disks adapted toreceive the adjusting rod centrally, coarse perforations on the disks, afiltering medium between the disks, a clamp threaded to the adjustingrod, levers integral with the clamp to adjust clamp on rod, an air ventpipe removably connected to the adjusting rod to aflord an outlet forair from the first settling chamber, a chamber for the reception of thepurified oil, means for withdrawal of the purified oil.

2. In an oil filter, the combination with an upper receiving tank aninlet pipe let into the receiving chamber midway of its depth, a groundunion at the lower part of the receiving chamber, a pipe leading fromthe chamber, rotatably attached to .the ground union and bent to form anL, means for adjusting said pipe to the withdrawal of water from thereceiving chamber, an outlet pipe in the receiving chamber midway of itsdepth, an angle valve at the outer termination of the outlet pipe, avalve at the inner terminus of the outlet pipe, a funnel open to the airbeneath the angle valve, a float chamber integral with the funnel, freecommunication between the funnel and the float chamber, a hollowpolyhedral float within the float chamber, a swivel interiorly disposedand fastened to the base of the polyhedral float, a support attached tothe top wall of the receiving chamber at a point conveniently above thedischarge pipe,

a lever pivoted to this support, a rod swiveled to the outer end of thislever and the base of the float, a rod swiveled to the inner end of saidlever and the valve on the inlet pipe to cooperate with the float andprevent an overflow from the funnel, a gravity pipe attached to thefunnel, means for conducting oil upwardly through a filtering medium andmeans for the withdrawal of the pure oil.

3. In a filter of the class specified, an upper receiving tank, aconducting pipe, a settling chamber at the lower extremity-0f theconducting pipe, a filtering medium above the settling chamber, a pureoil chamber disposed about the filtering medium, means for automaticallyadjusting the supply of oil from the receiving'chamber to a giventension of the filtering medium, means for regulation of the tension ofthe medium, means for Withdrawal of Water" from the receiving tank,means for Withdrawing air from the settling chamber, means forwithdrawing pure oil from the mainchamber, a secondary settling chamberopening into the first settling chamber, a valve between the settlingchambers, an angular air space formed in the upper part of the secondarysettling chamber an air vent within said chamber opening through theupper Wall chamber, sight glasses on receiving chamber pure oil chamberand secondary settling chamber.

In testimony that We claim the foregoing as our own, We have hereuntoaffixed our signatures in the presence of two Witnesses.

p LUGIUS R. CLARK.

DWIGHT or. KREUL,

Witnesses:

GEORGE W. Soor'r, COAINA M. Sco'rr.

